Reducing-pressure valve and regulator



A (No M5551.)Y

E. J. WOOD. REDUOINGPRESSURE VALVE AND REGULATOR.-

vPatentedlwt. 16, 1894.

. NITED` vSlrims PnrrnNtr GFFIOE.

EDGAR J. WOOD, or BROOKLYN, NEW YORK.

SPECIFICATION forming part of Letters Patent No. 527,575, dated October16, 1894. Application filed February 13, 1894.: `Serial No. 500,065. (Nomodel.)

To all whom it may concern:

Be it known that I, EDGAR J. WOOD, vof Brooklyn, in thecounty of Kingsand State of New York, have invented a new and useful tors in whichprovision is made for transmit-l ting an abnormal pressure on the lowpressure side of the valve to a diaphragm whichv controls a valve forthe admission of pressure from the high pressure side to the back ol"the main valve, to throw the same toward its seat and thereby reduce lowpressure side.

A practical embodiment of 'my invention is represented in theaccompanying drawings,

in whichl Figurel is a View of the valve in longitudi-l nal section, thewall being partially brokenV away in proximity to the head piece to showthe upper portion of the second passageway. Fig. 2 is a View of the samein transverse section, through line x, of. Fig. 1'. Fig. 3 is a detailsectional view. v

. My invention contemplates a valve which may be utilized eitherinconnection with the supply of a fluid under pressure as simply areducing valve and also with a pump for the purpose of regulating thepressure inthe means of a spring H inserted between 'its compressionchamber. A pipe section A, yprovided-fas is usualat its opposite endswith screw threaded sockets a and a for the purpose of connectingtherewith transmitting pipes, is provided with an interior diaphragm a2for separating the high pressure chamber B from the low pressure chamberB.r The diaphragm a2 is provided with an opening around which is, formeda valve seaty a3 on which a main valve C is adapted to seat. The sectionA is'provided with an extended hollow neck a4 within which the valve Cis fitted to reciprocate toward and away from its seat as. Y

The valve C is provided at its face with an extended guide stem cadapted to t and slide in a socket a5 projecting inwardly from the wallof the section A.

' A head piece D isprovided with a-screw the pressure on the louter endof the head piece D over the cham- `ber D by means of -a cap piece Gscrewed onto the Outer end of the-head piece;

, 'i The auxiliary valve E is returned toits nort mal position (shown inFig. l) by means of a vspring h inserted between the nut e and the iadjusting end e2, having a screw threaded engagement with 'the interiorof the cap piece Gand, for purposes of increasing or diminishing thetension of the spring h upon the valve gE, I leave an opening g in thetop of the cap j piece in order that a tool may be inserted into 'arecess e3 in the end e2 for turning'it toward Aor away from the end e',according as it is `desired to increase or diminish the tension.

P threaded extension d adapted. to screw into :'theouter end of the neck0.4 and form a closfure for the same. The said head piece is alsovprovided with a hollow outer portion df forming a chamber for thereception of the Huid .which is to operate the valve controllingdiaphragm, andin its inner face the said head =piece D is provided witha socket or chamber d2 for the reception of `the auxiliary piston-'valve E; The stem e of the valve E extends outwardly through the borein a central bear. ling cl3 of the head piece and through the diaphragmF with whichit is connected by a nut e screwed onto the threaded outerend ofthe stem.

.The diaphragm F is held in position at the The valve C is returnedtoward its seat by back and the inner end of the head piece D. kAsmallconduit K leads from the high pressure chamber B along, up withinthe wall of the neck a4 to a point opposite an annular groove d4 aroundthe exterior of the screw threaded extension dof the head piece, whichgrooved4 connects,'by a passageway k, with the 'socket or chamber d2 inwhich the auxil- IOO tion from the chamber at the back of the mainvalve, through its ports Z4, to the passageway L, leading to the lowpressure chamber. When the. said auxiliary valve E, under pressurewithin the chamber d', is lifted by means of the diaphragm F so as toopen communication between the chamber back ot the main valve C and thehigh pressure chamber B, it will-at the same time-close thecommunication between said chamber back of the main valve C and thepassageway L leading to the low pressure chamber B. The valve E islimited in its downward stroke by means of an annular seat CZ?, xed atthe open end of the chamber d2.

I provide the passageway L at the outer end of the neck a4 with aninternal screw threaded portion Z2 for the purpose of receiving a screwplug to stop the channel L when the valve is to be employed as a pumpregulator or governor and I further provide the head piece D with ascrew threaded opening di for receiving a screw plug d, sothat when usedas simply a reducing valve, the opening d8 may be closed and when usedas a pump governor it may be opened for the purpose of connecting thechamber cZ beneath the diaphragm with the compression chamber of thepump instead of directly with the low pressure chamber B.

The screw plug may be inserted into and removed from the screw threadedportion Z2 of the channel L by removing the head piece D.

y In operation, suppose the valve to be employed as simply a reducingpressure valve, the plug CZ closing the opening d8 and the plug forclosing the passageway L removed. Whenever the pressure upon the lowpressure side ot the main valve exceeds the predetermined limit, itspressure underneath the diaphragm F, communicated tothe chamber CZthrough the passageway L and Z will lift the diaphragm F and with it theauxiliary valve E, opening communication through the passageway K andthe high pressure sideof the main valve to the chamber at the back ofthe main valve and at the same time close the communication between thechamber at the back of the main valve and the passageway L leading tothe low pressure side of the valve. The pressure upon the oppositesidesof the main valve C will thereby become balanced and the valve Cwill be thrown by its own weight or by the spring I-I, or by both,toward its seat shutting 01T the supply of uid and thereby reducing thepressure on the low r haust of the fluid at the back ot the main valveout through the passageway Lto the low pressure side.

It will be observed that the auxiliary valve E, by means of its portsZ4, is at all times balanced-pso far as pressure from within the chamberat the back of the valve C is concerned.

If it be desired to use the valve as apump governor, the passageway Lwill be closed by the plug inserted in the screw-threaded portion Z2 andthe chamber cZ beneath the diaph ragm will be placed in communicationwith the compression chamber of the pump by removing the plug d. Theoperation of the valve will be in all respects quite similar under thesecircumstances to that hereinbefore described, the diaphragm F beingunder the control of the iiuid in the compression chamber onthe lowpressure side of the main valve and serve, when it exceeds thepredetermined limit, to open communication between the back of the mainvalve and the high pressure ,side and thereby reduce the supply ofact-ulating duid.

It is obvious that slight changes might be resorted to in theconstruction and arrangement of thetseveral parts herein describedwithout departing from the spirit and scope of my invention. Hence I donot wish to limit myself strictly to the structure herein set forth, but

What I claim is l. In combination, a casing, a main valve forcontrolling the passage of a fluid under `fpressure from a supply to thepoint where it is to be utilized, an auxiliary valve seated in a chamberin communication with the space i back of the main valve, a iiexiblediaphragm for transmitting motionto the auxiliary valve, p a passagewayleading from the high pressure chamber in which the auxiliary valvemoves, 3 passageways leading from the opposite or low pressure side ofthe main valve, one to the said auxiliary valve chamber and one to thediaphragm chamber, the movement of the 4auxiliary valve in one directionserving to open the high pressurepassageway and close the low pressurepassageway and the movement of the valve in the opposite directionserving to close the high pressure passageway and open the low pressurepassageway, substantially as set forth.

2. In combination, a casing, a main valve `for controllingthe-transmission of a Huid under pressure, an auxiliary valve providedwith a port extending through from its face to its back and seated in achamber in communication with the back of the main valve,

IIO

a iexible diaphragm for transmitting motion to the auxiliary valve,independent passage- Ways leading from the low pressure side of the mainvalve along the wall of the casing, the one to the diaphragm chamber andthe other to the auxiliary valve chamber, a third passageway leadingfrom the high pressurev side of the main valve along the wall of thevalve casing t0 the said auxiliary valve chamber, ,the movement of theauxiliary valve in one direction serving to open the high pressurepassageway and close the low pressure said passageway, means for openingand closv ing either of said passageways, an opening leading to thediaphragm chamber at pleasure, and a passageway leading from theopposite side of the said partition to the auxiliary valve chamber, incombination with the main valve, the auxiliary valve, the diaphragm andthe actuating springs, substantially as set forth. Y

4. The combination with the valve casing provided with a partitionhaving an opening for the transmission of Huid under pressure andfurther provided with a hollow neck, of a head piece provided with anauxiliary valve chamber and adaptedy to form a closurefor the end'of thesaid neck, a cap piece fitted to the top of said head piece, a flexiblediaphragm secured between the cap and head pieces, an auxiliary valveseated in the said chamber in the head piece and having its stemconnected with the iiexible diaphragm, a traveling nut located withinthe cap piece, a spring interposed between the said nut and thediaphragm, a main valve seated within the hollow necka spring 'insertedbetween the said valve and head piece, passageways leading from theopposite sides of the partition to the auxiliary valve chamber and apassageway leading from one side of said partition to` the diaphragmchamber, substantially as set forth.

EDGAR woon Witnesses: t

FREDK. HAYNEs, GEORGE BARRY.

